
Thank you all for the help and assistance (but i am quite sure i will have many more queries as i go on)
kind regards
Sven
Neil Spooner wrote:Hi Sven,
I am currently away from home so using a horrible iPhone to type...slow & tedious, plus I don’t have access to all the photos. Anyway:
Oil systems:
Oil Feed:
I have found a supplier for a front cover for the oil pump, which is actually designed for an external oil feed to a cooler, but, if the intake of the oil pump (pump removed) were blocked off and the front cover reversed so that it now provides an inlet to the pump then that is now your oil feed inlet sorted, no need to modify the crankcase.
Could you, once you are back, furnish particulars of the supplier
The oil change over valve has three ports: can i use the Raven System oil valve?https://www.aircraftspruce.com/catalog/eppages/basicinverted.php
Top which goes to the top of the engine case, such as where the oil filler is located, can i use the inlet at the top of case where the cooler may reside, but which is used in the Tipsy to supply oil to and from the heater around the fuel manifold? or a T that goes to the top of the rocker covers as per B Smith.
Middle goes to the inlet port of the oil pump. the Aerovee has an oilpump at the front which i presently use for the oil cooler - can i simply use a T from the oil change over valve?
Bottom which goes to the bottom of the conventional sump.
Breather:
You will need to create a “change over” breather box. Difficult to describe but essentially allows the engine crankcase to breathe when inverted without dumping the oil overboard. More later. can i use the Raven oil separator? space seems to be a problem
Fuel systems:
Flop tube:
There is available submersible fuel hose that is designed to live inside of a fuel tank. You will fit a clunk weight to one end, the other to a tank fitting at the middle (vertically and horizontally) of the front of the fuel tank. This then goes to a fuel selector for “Sump or Flop”i think i can source all this from aircraft spruce
Carburettor:i have sourced an Aerovee
Sadly Ellison no longer make the EFS2, second hand ones do become available but are very rare. So, regrettably the only other unit available is the Rotec. I have had terrible problems with Rotec, so will have nothing to do with them. But as it stands they are the only provider of a slide carbs. The Aerovee & Revflow units seem to very difficult to set up, use and maintain.
Seat belt:
A good 4 point belt with a backup lap strap is a must. The shoulder harness needs to go to the cross tube just behind the seat to provide torso support. Not ideal but the only viable solution. (This setup has been thoroughly tested during my forced landing, & restrained me very well).
All articles in the aircraft need to be restrained for inverted flight to -4g.
As Paul says, you need to work hard on the weight of all of this, it’s all pointless if the a/c is too heavy for aeros.
Personally I would have trouble owning/operating my own a/c if it wasn’t able to fly inverted, it really does provide freedom from terrestrial life.
More later....
Best wishes.
Neil
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